Identify Different Magazines By Touch The Magpul Tactile Lock-Plate fits Gen M3 PMAGs to enable you to quickly and easily identify magazines by feel - no need to take your eyes off the target. The Tactile Lock-Plate replaces the standard Gen M3 lock plate to provide raised knobs that protrude 1/8"" through the floor plate and help you ID mags loaded with different types of ammo simply by feel. Magpul's Tactile Lock-Plate comes in Type 1 (single knob) or Type 2 (two knob) configurations. By combining the two types with a standard smooth floor plate, you can easily differentiate between mags loaded with, for example, ball, tracer, or subsonic ammo just by fee Mfg: Magpul